摘要:
The recording head have a substrate and a plurality of ring-shaped recording electrodes juxtaposed on the substrate. A counter electrode is located above the recording electrodes and spaced apart therefrom by a predetermined distance. Each recording electrode consists of a ring and a lead. A pulse generator is connected by an IC (not shown) to the leads, for applying a drive voltage to each recording electrode. The drive voltage consists of a bias voltage and a recording voltage higher than the bias voltage. When a bias voltage, having the same polarity as a charged polarity of coloring particles dispersed in an insulating liquid, is applied to each recording electrode, potential wells are formed. The coloring particles in ink are thereby trapped in the ring of the electrodes. The coloring particles agglomerate in the apical part of the ink meniscus formed at the recording electrode. When the recording voltage, having the same polarity as a charged polarity of the coloring particles. is applied to any recording electrodes selected in accordance with an image signal, the agglomeration of coloring particles flies from the potential well toward the counter electrode, forming any dot on a recording medium interposed between the recording head and the counter electrode.
摘要:
A developing device comprises a toner separating member placed in contact with a developing roller for developing a latent image on a photoconductive drum into a visible image with nonmagnetic toner conveyed as a one-component developing agent, and a toner feeding roller provided near the toner separating member. The toner separating member allows the toner which has passed on a developing position of the photosensitive drum to be separated from the developing roller. The toner feeding roller allows the separated toner to be transferred toward a toner receiving side of the developing roller.
摘要:
An image forming apparatus having a humidity detector which is detachably attached to the main apparatus body that accommodates an image forming member. The humidity detector detects a humidity in the vicinity of the image forming member, converts the detected humidity into a relative humidity and outputs it. Based on the value of the output relative humidity, image forming conditions, such as the amount of exposure, are set. The humidity detecting unit contains a time detecting unit for detecting the time for replacement.
摘要:
A recording apparatus comprising an image carrying body, a device for forming an electrostatic latent image on the image carrying body, a developing and cleaning device adapted to press an elastic developing member, having a developing agent formed on the surface thereof, against the latent image, for sliding contact with a speed difference therebetween, to reverse-develop the latent image, and to remove developing agent remaining on the image carrying body, and a contact-transfer device for pressing a sheetlike material against the developing agent image on the image carrying body, to transfer the developing agent image to the sheetlike material. The developing agent on the elastic developing member is a one-component developing agent charged to the same polarity as the electrostatic latent image.
摘要:
A laser actuated image recording apparatus having an ink retaining layer. Concentrated light is projected towards a flexible film ink retaining layer so as to heat ink contained thereon and cause bubbles to form in the ink. The bubbles burst and propel ink droplets towards a recording member.
摘要:
A developing apparatus is provided with a developing roller for carrying a toner thereon and an elastic blade pressed against the surface of the developing roller to apply the toner thereto. The toner is thus applied to the surface of the developing roller by the elastic blade to form a thin layer of the toner on the surface of the developing roller. The thin layer is opposed to a photosensitive drum at a predetermined space to deposit the toner on an electrostatic latent image on the photosensitive drum. Magnets and magnetic particles are provided to prevent the toner from leaking out.
摘要:
An electronic copying machine including apparatus for supplying one of at least two sizes of paper has a transparent surface for receiving a paper to be copied, a lid for covering the paper during copying, a light sensor mounted beneath the surface for directing light at a predetermined wavelength to the surface and detecting the light reflected from the surface, a first roller drive for supplying a first size of paper when the light sensor detects that the paper to be copied is that first size and a second roller drive for supplying a second size of paper when the light sensor detects the paper to be copied is the second size.
摘要:
A transfer roller is provided near a developing roller which is set, at a relative speed of substantially zero, in contact with a photosensitive drum to develop an electrostatic latent image on the photosensitive drum into a visual image. A toner transfer roller supplies a toner, that is, a one-component developing agent which is stored in a toner storage section to the developing roller and receives that toner which is unspent upon development from the developing roller. The unspent toner transferred to the toner transfer roller is brought into abutting contact with a mesh network of a toner separating member to separate the toner from the toner transfer roller over a predetermined effective length. By so doing it is possible to erase a developing hysteresis from the developing roller and, at the same time, collect the toner back into the toner storage section so that the collected toner is mixed with a fresh toner for use at the next developing cycle.
摘要:
An image forming apparatus includes a transfer brush for transferring to a paper sheet a developed image on an photoconductive drum. The transfer brush is formed in a plate-like shape by a number of electroconductive fibers bundled together. The transfer brush has a contact portion set in elastic contact with the drum. The brush presses the paper sheet, which is fed by the feeding device, against the drum under a predetermined pressing force. A DC current supply applies voltage to the paper sheet through the transfer brush so as to electrostatically attract the developed image to the paper sheet. The transfer brush is inclined to the image carrier so as to allow the paper sheet to be guided into an area between the drum and the transfer brush.
摘要:
An image forming apparatus for forming a toner image. The apparatus includes a photosensitive drum, a laser device for forming a latent image on the photosensitive drum, a developing device for developing the latent image with a toner agent/and for cleaning the toner agent remaining on the photosensitive drum therefrom while the latent image is developed, a transfer device for transferring the developed image on the photosensitive drum to a recording medium such as a paper sheet, a disordering and charging device for disordering the toner agent remaining on the photosensitive drum after transfer of the developed image by the transfer device so as to render the developed image unreadable or nonpatterned, and for charging the photosensitive drum at a predetermined potential while the toner agent remaining on the photosensitive drum is disordered and a bias source for supplying the disordering and charging device with a bias voltage having an AC bias voltage.